422864209 has 8 divisors (see below), whose sum is σ = 446360480. Its totient is φ = 400601700.

The previous prime is 422864203. The next prime is 422864213. The reversal of 422864209 is 902468224.

It is not a de Polignac number, because 422864209 - 2⁷ = 422864081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422864203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23967 + ... + 37684.

It is an arithmetic number, because the mean of its divisors is an integer number (55795060).

Almost surely, 2^422864209 is an apocalyptic number.

It is an amenable number.

422864209 is a deficient number, since it is larger than the sum of its proper divisors (23496271).

422864209 is an frugal number, since it uses more digits than its factorization.

422864209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61708 (or 61670 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 422864209 is about 20563.6623440476. The cubic root of 422864209 is about 750.5857403512.

The spelling of 422864209 in words is "four hundred twenty-two million, eight hundred sixty-four thousand, two hundred nine".